diff --git a/pysollib/games/yukon.py b/pysollib/games/yukon.py
index 79dbf38a..0a8c4882 100644
--- a/pysollib/games/yukon.py
+++ b/pysollib/games/yukon.py
@@ -101,7 +101,7 @@ class RussianSolitaire(Yukon):
 # ************************************************************************
 
 class Moosehide_RowStack(Yukon_AC_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return (c1.suit != c2.suit and c1.rank == c2.rank+1)
 
     def getHelp(self):
@@ -172,7 +172,7 @@ class Grandfather(RussianSolitaire):
 # ************************************************************************
 
 class Alaska_RowStack(Yukon_SS_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return (c1.suit == c2.suit and
                 ((c1.rank + self.cap.dir) % self.cap.mod == c2.rank or
                  (c2.rank + self.cap.dir) % self.cap.mod == c1.rank))
@@ -191,7 +191,7 @@ class Alaska(RussianSolitaire):
 # ************************************************************************
 
 class Roslin_RowStack(Yukon_AC_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return (c1.color != c2.color and
                 ((c1.rank + self.cap.dir) % self.cap.mod == c2.rank or
                  (c2.rank + self.cap.dir) % self.cap.mod == c1.rank))
@@ -289,7 +289,7 @@ class Abacus_Foundation(SS_FoundationStack):
 
 
 class Abacus_RowStack(Yukon_SS_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         dir, mod = -(c1.suit + 1), 13
         return c1.suit == c2.suit and (c1.rank + dir) % mod == c2.rank
 
@@ -587,7 +587,7 @@ class DoubleRussianSpider(RussianSpider, DoubleRussianSolitaire):
 # ************************************************************************
 
 class Brisbane_RowStack(Yukon_AC_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return (c1.rank + self.cap.dir) % self.cap.mod == c2.rank
 
     def getHelp(self):
diff --git a/pysollib/stack.py b/pysollib/stack.py
index 1ec6d66c..9df7bdcf 100644
--- a/pysollib/stack.py
+++ b/pysollib/stack.py
@@ -2629,7 +2629,7 @@ class Yukon_AC_RowStack(BasicRowStack):
         kwdefault(cap, max_move=999999, max_accept=999999)
         BasicRowStack.__init__(self, x, y, game, **cap)
 
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return ((c1.rank + self.cap.dir) % self.cap.mod == c2.rank and
                 c1.color != c2.color)
 
@@ -2637,7 +2637,7 @@ class Yukon_AC_RowStack(BasicRowStack):
         if not self.basicAcceptsCards(from_stack, cards):
             return False
         # [topcard + card[0]] must be acceptable
-        if self.cards and not self._isSequence(self.cards[-1], cards[0]):
+        if self.cards and not self._isYukonSequence(self.cards[-1], cards[0]):
             return False
         return True
 
@@ -2659,7 +2659,7 @@ class Yukon_AC_RowStack(BasicRowStack):
 # A Yukon_SameSuit_RowStack builds down by rank and suit,
 # but can move any face-up cards regardless of sequence.
 class Yukon_SS_RowStack(Yukon_AC_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return ((c1.rank + self.cap.dir) % self.cap.mod == c2.rank and
                 c1.suit == c2.suit)
 
@@ -2678,7 +2678,7 @@ class Yukon_SS_RowStack(Yukon_AC_RowStack):
 # A Yukon_Rank_RowStack builds down by rank
 # but can move any face-up cards regardless of sequence.
 class Yukon_RK_RowStack(Yukon_AC_RowStack):
-    def _isSequence(self, c1, c2):
+    def _isYukonSequence(self, c1, c2):
         return (c1.rank + self.cap.dir) % self.cap.mod == c2.rank
 
     def getHelp(self):